Question

For the graph x = -3 find the slope of a line that is parallel to it.

A.-3
B.undefined
C.-1/3
D.0​

Answer 1

the answer is B. undefined because any line perpendicular to line x=-3 will mean it is a vertical line, and the slope of the vertical lines is undefined;

so the slope of the line parallel to x=-3 will be undefined.

Answer 2

Answer: D

Explanation:

For parallel lines, they have the same slope, but different y-intercepts.

x=-3 has a slope of 0 because it is a vertical line. Therefore, the slope of the line that is parallel to is is also 0.